
The deep web, also known as the hidden web or invisible web, refers to parts of the World Wide Web not indexed by search engines. This includes dynamic pages, private pages, and pages behind paywalls or authentication forms. The term is often confused with the dark web, which is a small subset of the deep web that has been intentionally hidden and is inaccessible through standard web browsers. The deep web is estimated to be much larger than the surface web, which is the portion of the web that is indexed and accessible through search engines. The Hebrew translation for "deep web" is הרשת העמוקה, while in Spanish it is known as la web profunda, and in French as la toile profonde. The deep web is not inherently malicious; it includes many legitimate and secure sites, such as online banking systems, email services, and private corporate intranets. However, it is also home to illegal activities, which is why it is often associated with secrecy and anonymity.